What does ISO 9001 require?

To get certified to ISO 9001 you must meet all the applicable requirements. A requirement is something you must do or have. Some - in fact most - requirements are very broad, while others are very specific.

A couple of examples of requirements:

"The organization shall implement production and service provision under controlled conditions." (8.5.1 - very broad, requiring you to have controls over whatever it is that you do, whether supplying services or producing things)

"The quality policy shall ... be available and be maintained as documented information" (5.2.2 - fairly specific, requires you to have a quality policy and that it be in writing)